SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function arrayJoin (alias k) (children 1)
     ExpressionList (children 1)
      Function arrayMap (children 1)
       ExpressionList (children 2)
        Function lambda (children 1)
         ExpressionList (children 2)
          Function tuple (children 1)
           ExpressionList (children 1)
            Identifier x
          Identifier x
        Function arraySort (children 1)
         ExpressionList (children 1)
          Function groupArray (children 1)
           ExpressionList (children 1)
            Function tuple (children 1)
             ExpressionList (children 2)
              Identifier ts
              Identifier n
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 3)
           Identifier ts
           Identifier n
           Identifier z
          TablesInSelectQuery (children 2)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.one
           TablesInSelectQueryElement (children 1)
            ArrayJoin (children 1)
             ExpressionList (children 3)
              Literal Array_[UInt64_1, UInt64_3, UInt64_4, UInt64_5, UInt64_6] (alias ts)
              Literal Array_[UInt64_1, UInt64_2, UInt64_2, UInt64_2, UInt64_1] (alias n)
              Literal Array_[\'a\', \'a\', \'b\', \'a\', \'b\'] (alias z)
          ExpressionList (children 2)
           OrderByElement (children 1)
            Identifier n
           OrderByElement (children 1)
            Identifier ts
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier z
     Literal \'a\'
   ExpressionList (children 1)
    Identifier z